Kilogram: Difference between revisions
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'''Dayna, how does this read to you? I had vague thoughts of adding a video, perhaps this one? https://www.youtube.com/watch?v=c_e1wITe_ig - Jason''' | |||
== | '''Jason, I like that video! It's a bit long but I think that's okay. Some of the links on the page didn't work so I found some other articles from the same site. I also changed up the wording so it may need editing. - Dayna''' | ||
<onlyinclude>A '''kilogram''' is the [[SI]] [[units|unit]] of [[mass]] and one of the 7 base units. It is the only SI unit with a [[prefixes|prefix]].</onlyinclude> The prefix "Kilo" is used for both the name and symbol of kilogram and is equal to 1000 or 10<sup>3</sup> [[gram]]s. Originally the gram was going to be the base unit, but due to historical reasons regarding an artifact used to define the kilogram, the kilogram was chosen as the SI base unit for mass. As of 2018, the kilogram (kg) is now defined by taking the fixed numerical value of [[Planck's constant]] ''h'' to be 6.62607015 × 10<sup>−34</sup> kg m<sup>2</sup> s<sup>−1</sup>. This decision was made in order to ensure the long-term stability of the unit of [[mass]].<ref>Bureau International des Poids et Mesures, "''Mise en pratique'' for the definition of the kilogram (2020)," [Online], Available: https://www.bipm.org/en/search?p_p_id=search_portlet&p_p_lifecycle=2&p_p_state=normal&p_p_mode=view&p_p_resource_id=%2Fdownload%2Fpublication&p_p_cacheability=cacheLevelPage&_search_portlet_dlFileId=41489972&p_p_lifecycle=1&_search_portlet_javax.portlet.action=search&_search_portlet_formDate=1622783457642&_search_portlet_query=kilogram&_search_portlet_source=BIPM</ref> | |||
<ref>Bureau International des Poids et Mesures, "Appendix 4. Historical notes on the development of the International System of Units and its base units," [Online], Available: https://www.bipm.org/en/publications/si-brochure.</ref> | |||
For a fascinating video on the origin of the kilogram and the impact of the new definition of a kilogram see Veritasium's video below. | |||
==Conversions== | |||
<html><br /> <iframe src="https://energyeducation.ca/simulations/converter/converter.php?defaultMeasure=Mass&defaultFrom=kilogram&defaultTo=pound" scrolling="no" width="750" height="200"> </iframe><br /> </html> | <html><br /> <iframe src="https://energyeducation.ca/simulations/converter/converter.php?defaultMeasure=Mass&defaultFrom=kilogram&defaultTo=pound" scrolling="no" width="750" height="200"> </iframe><br /> </html> | ||
== | ==Video: The kg is dead, long live the kg== | ||
*[[ | <html> | ||
*[[ | <iframe width="800" height="500" src="https://www.youtube.com/embed/c_e1wITe_ig" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> | ||
*[[ | </html> | ||
*[[ | |||
==Further Reading== | |||
*[[Mass]] | |||
*[[Weight]] | |||
*[[Planck's constant]] | |||
*[[Mass-energy equivalence]] | |||
*Or explore a [[Special:Random|random page]] | *Or explore a [[Special:Random|random page]] | ||
==References== | |||
==References== | |||
{{reflist}} | {{reflist}} | ||
[[Category:Uploaded]] | [[Category:Uploaded]] | ||
Revision as of 22:20, 9 September 2021
Dayna, how does this read to you? I had vague thoughts of adding a video, perhaps this one? https://www.youtube.com/watch?v=c_e1wITe_ig - Jason
Jason, I like that video! It's a bit long but I think that's okay. Some of the links on the page didn't work so I found some other articles from the same site. I also changed up the wording so it may need editing. - Dayna
A kilogram is the SI unit of mass and one of the 7 base units. It is the only SI unit with a prefix. The prefix "Kilo" is used for both the name and symbol of kilogram and is equal to 1000 or 103 grams. Originally the gram was going to be the base unit, but due to historical reasons regarding an artifact used to define the kilogram, the kilogram was chosen as the SI base unit for mass. As of 2018, the kilogram (kg) is now defined by taking the fixed numerical value of Planck's constant h to be 6.62607015 × 10−34 kg m2 s−1. This decision was made in order to ensure the long-term stability of the unit of mass.[1]
[2]
For a fascinating video on the origin of the kilogram and the impact of the new definition of a kilogram see Veritasium's video below.
Conversions
Video: The kg is dead, long live the kg
Further Reading
- Mass
- Weight
- Planck's constant
- Mass-energy equivalence
- Or explore a random page
References
- ↑ Bureau International des Poids et Mesures, "Mise en pratique for the definition of the kilogram (2020)," [Online], Available: https://www.bipm.org/en/search?p_p_id=search_portlet&p_p_lifecycle=2&p_p_state=normal&p_p_mode=view&p_p_resource_id=%2Fdownload%2Fpublication&p_p_cacheability=cacheLevelPage&_search_portlet_dlFileId=41489972&p_p_lifecycle=1&_search_portlet_javax.portlet.action=search&_search_portlet_formDate=1622783457642&_search_portlet_query=kilogram&_search_portlet_source=BIPM
- ↑ Bureau International des Poids et Mesures, "Appendix 4. Historical notes on the development of the International System of Units and its base units," [Online], Available: https://www.bipm.org/en/publications/si-brochure.